Birch juice collecting and drilling auxiliary tool

Abstract

The invention discloses a birch juice collecting and drilling auxiliary tool, and relates to the technical field of birch juice collecting. The problems that according to an existing birch juice collecting and drilling tool, the drilling quality is difficult to guarantee, and the drilling efficiency is low are solved. A support is of a hollow cylindrical structure with the front end face being an inclined face, a positioning ring is coaxially arranged on the front portion of the support in a sliding mode, and a plurality of drilling depth limiting gears are sequentially arranged on the side face of the front portion of the support from front to back in the axial direction of the support. The positioning ring and the support are detachably connected through a positioning ring limiting piece to achieve free switching of different drilling depth limiting gears in the axial direction of the support, an electric drill is arranged in the support and connected with the support through an electric drill axial feeding guide mechanism, and therefore a drill bit can move in the axis direction of the support when the electric drill conducts axial feeding action. And finally, the birch sap reaches a set drilling depth limiting gear, and birch sap collecting and drilling operation under the set drilling angle and depth is completed. The birch juice collecting and drilling device is used for improving the birch juice collecting and drilling quality and efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of birch sap collection, and particularly relates to a drilling auxiliary tool for birch sap collection. Background Art

[0002] Birch sap, as the liquid flowing out from the trunk of Betula platyphylla, a plant of the Betulaceae family, is rich in 17 trace elements such as potassium, calcium, phosphorus, iron, sodium, and zinc, more than 10 kinds of amino acids, fatty acids, and various vitamins. These components are easily absorbed by the human body and play an active role in promoting the normal activities and metabolism of human life, and are widely used in the fields of beverages, medicine, beauty, etc.

[0003] Birch sap is mainly produced in the northeastern region of China, including the Greater and Lesser Hinggan Mountains and the Changbai Mountains. The climate is cold, which is suitable for the growth of birch trees. There are a large number of birch tree varieties such as Betula platyphylla, providing rich resources for the collection of birch sap. In places such as Hulunbuir in the northeast, the forest coverage rate is high and there are many birch trees, which is also one of the production areas of birch sap. The local birch trees grow well in the suitable natural environment and can produce high-quality birch sap.

[0004] Birch sap collection is generally carried out in spring. Since the sap collection window period of birch sap is relatively short, depending on the region, it is concentrated on sunny days 10 - 15 days before the germination of birch tree leaf buds and when the temperature is above -5°C. After the birch tree exudes sap, it can be continuously collected for about 30 days. Once birch sap is separated from the tree body, it will start to ferment and deteriorate within 6 hours, which poses great challenges to the large-scale scientific collection and fresh juice preservation and processing of birch sap. Traditional birch sap collection mostly uses the closed liquid collection method, that is, the single-tree hanging bucket decentralized liquid collection method. During operation, select Betula platyphylla with a breast diameter greater than 20 cm for birch sap collection. Use an electric drill to drill a hole on the sunny side of the tree trunk at a distance of 30 cm - 60 cm from the ground. The diameter of the drill bit is not greater than 12 mm, and the drill hole forms an angle of about 15° with the tree trunk (the outlet is low and the inner hole is high). One end of the liquid collection pipe is inserted into the drilled tree hole, and the other end of the liquid collection pipe is connected to a liquid receiving bucket or a liquid receiving bag through an infusion pipe. Although this collection method is simple to install and low in cost, the liquid collection time is long, and there is a certain impact on the preservation of the sap. In addition, there is also a risk of contaminating the sap.

[0005] There are certain requirements for the drilling depth in the birch sap collection standard, that is, when the breast diameter of the tree trunk is between 20 cm - 26 cm, the drilling depth is between 3 cm - 4 cm, and the number of drill holes is 1; when the breast diameter of the tree trunk is between 27 cm - 34 cm, the drilling depth is between 5 cm - 6 cm, and the number of drill holes is 2; when the breast diameter of the tree trunk is between 35 cm - 40 cm, the drilling depth is between 7 cm - 8 cm, and the number of drill holes is 3 - 4; when the breast diameter of the tree trunk is greater than 40 cm, the drilling depth is between 7 cm - 8 cm, and the number of drill holes is 4 - 5.

[0006] Therefore, during the process of birch sap collection, both the drilling depth and the drilling angle have extremely important impacts on the collection of birch sap.

[0007] I. If the drilling depth is insufficient, it may cause the following damages to the tree trunk: (1) Less sap collected: It fails to reach the deep xylem rich in sap and cannot fully contact the main sap transportation channels, resulting in a smaller amount of birch sap flowing out, which affects the collection efficiency and yield. (2) Short sap collection time: Since it does not reach the appropriate position, as the sap collection process progresses, the limited sap around is quickly collected, shortening the sap collection time and unable to continuously and stably obtain birch sap throughout the collection cycle. (3) Unstable sap quality: A shallower drilling may mix more impurities from the bark or shallow xylem into the collected sap, affecting the purity and quality of birch sap, reducing the content of its nutrients, and also possibly affecting its taste and appearance.

[0008] II. If the drilling depth is too deep for a birch tree with a small diameter, it may cause the following damages to the tree trunk: (1) Damage to the conducting tissue: Drilling too deep may overly damage the conducting tissues such as vessels and sieve tubes in the birch tree trunk, affecting the normal transportation of water and nutrients in the tree, resulting in inhibited tree growth, such as yellowing leaves and withered branches. (2) Weakening of the trunk structure: It will cause a greater degree of damage to the xylem structure of the trunk, reducing the strength and stability of the trunk. A birch tree with a small diameter has a relatively thin and fragile trunk, and is more likely to break under external forces such as wind and rain, affecting the survival of the tree. (3) Increased risk of infection: Too deep drilling will form a larger wound, making the tree more vulnerable to the invasion of external pathogens and pests. Pathogens may invade the tree body from the wound, causing diseases, and pests may also lay eggs or bore into the wound, further endangering the health of the birch tree.

[0009] III. If the drilling angle is too large, it may have the following impacts on the collection of birch sap: (1) Poor sap flow: If the drilling angle is too large, the outlet will be too low and the inner opening will be relatively too high. This may cause the birch sap to quickly flow towards the outlet under the action of gravity, but due to the low outlet position, some sap may accumulate in the drilling and cannot flow out smoothly, affecting the collection efficiency. (2) More impurities mixed in: A too large angle may make the drilling outlet closer to the ground, and dust, impurities, etc. on the ground are more likely to enter the collection container through the drilling, contaminating the birch sap and reducing its quality. (3) Damage to the tree trunk: A larger drilling angle may damage more internal tissues of the tree trunk, affecting the normal growth and recovery of the birch tree and increasing the risk of the tree being infected by diseases and pests.

[0010] IV. If the drilling angle is too small, it may have the following impacts on the collection of birch sap: (1) Slow sap flow rate: When the drilling angle is too small, the height difference between the outlet and the inner opening is small, which is not conducive to the natural outflow of birch sap under the action of gravity, resulting in a slow sap flow rate, prolonging the collection time, and reducing the collection efficiency. (2) Prone to blockage: A smaller angle may reduce the flow space of the sap in the drill hole, making it easy to be blocked by impurities such as bark chips and wood fibers, further hindering the outflow of sap and affecting the collection effect. (3) Incomplete sap collection: Due to the poor sap flow, the birch sap around the drill hole may not be fully collected, causing waste of resources and reducing the sap collection volume.

[0011] In summary, the existing drilling tools for birch sap collection have problems of difficult to ensure drilling quality and low drilling efficiency. Summary of the Invention

[0012] The purpose of the present invention is to solve the problems that the existing drilling tools for birch sap collection are difficult to ensure drilling quality and have low drilling efficiency, and further provide an auxiliary tool for drilling for birch sap collection.

[0013] The technical solution of the present invention is as follows: An auxiliary tool for drilling for birch sap collection, the auxiliary tool includes a bracket 1, a positioning ring 2, a positioning ring limiting member 3, and an electric drill axial feed guiding mechanism 4. The bracket 1 is a hollow cylindrical structure with an inclined front end face. The positioning ring 2 is slidably sleeved coaxially on the front part of the bracket 1. A plurality of drilling depth limiting gears are arranged in sequence along the axial direction of the bracket on the side surface of the front part of the bracket 1. The positioning ring 2 and the bracket 1 are detachably connected through the positioning ring limiting member 3 to realize free switching between different drilling depth limiting gears in the axial direction of the bracket. An electric drill 5 is arranged inside the bracket 1, and the electric drill 5 is connected to the bracket 1 through the electric drill axial feed guiding mechanism 4 to enable the drill bit to move along the axis direction of the bracket when the electric drill 5 performs an axial feed action, and finally reach the established drilling depth limiting gear, completing the birch sap collection drilling operation at the established drilling angle and depth.

[0014] Further, the included angle between the front end face of the bracket 1 and the plane perpendicular to the axis of the bracket is α, and α = 15°.

[0015] Further, the bracket 1 includes an angle limiting cylinder 1-1, a terminal ring plate 1-2, and a plurality of connecting rods 1-3. The front end face of the angle limiting cylinder 1-1 is inclined. A coaxial terminal ring plate 1-2 is arranged at the rear side of the angle limiting cylinder 1-1. The terminal ring plate 1-2 and the angle limiting cylinder 1-1 are connected through a plurality of circumferentially arranged connecting rods 1-3. The connecting rods 1-3 are arranged parallel to the axis of the bracket. An electric drill avoidance opening is provided on the side part of the terminal ring plate 1-2.

[0016] Further, the auxiliary tool further includes a handle 6, and the handle 6 is disposed on the side wall of the connecting rod 1-3 opposite to the drill avoidance opening, and the handle 6 is arranged perpendicular to the connecting rod 1-3.

[0017] Further, the number of the positioning ring limit members 3 is two, and the two positioning ring limit members 3 are respectively located on both sides of the positioning ring 2. Each positioning ring limit member 3 corresponds to three drilling depth limit jacks 1-4, and the three drilling depth limit jacks 1-4 are uniformly arranged in sequence from front to back along the axial direction of the bracket.

[0018] Further, the positioning ring limit member 3 adopts a locking screw or a pin mechanism; When the positioning ring limit member 3 adopts a locking screw, the drilling depth limit jack 1-4 on the outer side surface of the corresponding connecting rod 1-3 is a threaded hole, and a positioning ring round hole corresponding to the drilling depth limit jack 1-4 is arranged on the side surface of the positioning ring 2. The locking screw passes through the positioning ring round hole and is threadedly connected to the drilling depth limit jack 1-4; When the positioning ring limit member 3 adopts a pin mechanism, the drilling depth limit jack 1-4 on the outer side surface of the corresponding connecting rod 1-3 is a circular optical hole, and a positioning ring round hole corresponding to the drilling depth limit jack 1-4 is arranged on the side surface of the positioning ring 2. The pin mechanism includes a pin 3-1, a sleeve 3-2, a screw sleeve 3-3, a compression spring 3-4 and a nut 3-5. One end of the pin 3-1 passes through the positioning ring round hole and is inserted into the corresponding drilling depth limit jack 1-4. The middle part of the pin 3-1 is sleeved with the sleeve 3-2. One end of the sleeve 3-2 is fixedly connected to the positioning ring 2. A step surface is arranged on the inner wall of the sleeve 3-2. A shoulder is arranged in the middle of the pin 3-1. The other end of the sleeve 3-2 is threadedly connected to the screw sleeve 3-3. The middle part of the pin 3-1 is sleeved with the compression spring 3-4. The lower end of the compression spring 3-4 abuts against the upper surface of the shoulder of the pin 3-1, and the upper end of the compression spring 3-4 abuts against the lower end surface of the screw sleeve 3-3. The other end of the pin 3-1 is threadedly connected to the nut 3-5.

[0019] Further, the outer side surface of the connecting rod 1-3 is an arc surface. The auxiliary tool further includes a plurality of steel balls 7 and a plurality of ball retaining rings 8. Two hemispherical grooves symmetrically arranged on the left and right sides of the radial round hole of the positioning ring are arranged on the inner side surface of the positioning ring 2. The steel balls 7 are embedded in the hemispherical grooves. An axial guide groove with an arc-shaped cross section matching the hemispherical groove is arranged on the outer side surface of the connecting rod 1-3. When the positioning ring 2 and the connecting rod 1-3 move relative to each other, rolling cooperation is realized through the steel balls 7. A stepped ring groove is arranged at the top end of the hemispherical groove on the inner side surface of the positioning ring 2. The ball retaining ring 8 is embedded in the stepped ring groove. The ball retaining ring 8 is connected to the positioning ring 2 through a connecting member. The diameter of the central hole of the ball retaining ring 8 is smaller than the diameter of the steel ball.

[0020] Furthermore, the axial feed guiding mechanism 4 of the electric drill includes an electric drill fixing bracket 4-1, a linear bearing 4-2, and a slide rail 4-3. The electric drill fixing bracket 4-1 includes an electric drill fixing bushing 4-1-1, a plurality of connecting rods 4-1-2, and a plurality of bearing connecting sleeves 4-1-3. The central hole of the electric drill fixing bushing 4-1-1 has a clearance fit with the front end cylinder section of the outer shell of the electric drill 5. A plurality of radial connecting rods 4-1-2 are arranged on the outside of the electric drill fixing bushing 4-1-1, and one bearing connecting sleeve 4-1-3 is respectively arranged at the end of each radial connecting rod 4-1-2. The linear bearing 4-2 is embedded in the inner hole of the bearing connecting sleeve 4-1-3, and the slide rail 4-3 is inserted into the inner hole of the linear bearing 4-2. Both ends of the slide rail 4-3 are connected to the angle limiting cylinder 1-1 and the end ring plate 1-2 respectively.

[0021] Furthermore, the electric drill fixing bracket 4-1 is an integral structure, and the electric drill fixing bushing 4-1-1, the connecting rod 4-1-2, and the bearing connecting sleeve 4-1-3 are integrally formed.

[0022] Furthermore, the electric drill fixing bracket 4-1 is a split structure, and the electric drill fixing bushing 4-1-1, the connecting rod 4-1-2, and the bearing connecting sleeve 4-1-3 are assembled by fitting.

[0023] The present invention has the following effects compared with the prior art: 1. The birch sap collection drilling auxiliary tool of the present invention can accurately control the drilling depth of the electric drill bit during the birch sap collection drilling process. By arranging a plurality of hole positions at intervals along the axial direction of the bracket on the front outer side of the connecting rod 1-3 of the bracket 1, the relative position of the positioning ring 2 on the bracket 1 can be quickly adjusted. After the position of the positioning ring 2 is determined, the positioning ring limiting member 3 is used to fix the positioning ring 2. On the one hand, it can effectively improve the drilling quality and drilling efficiency, thus effectively avoiding the problems of less sap collection amount, short sap collection time, and unstable sap quality caused by insufficient drilling depth. On the other hand, it can also effectively avoid the problems of damaging the conductive tissue, weakening the tree trunk structure, and increasing the infection risk caused by excessive drilling depth.

[0024] 2. The birch sap collection drilling auxiliary tool of the present invention can quickly determine the drilling angle of the electric drill bit during the birch sap collection drilling process. By setting the front end face of the angle limiting cylinder 1-1 of the bracket 1 as a 15° inclined plane, during the birch sap collection process, the operator only needs to hold the auxiliary tool and press the front end face of the angle limiting cylinder 1-1 tightly against the tree trunk surface to quickly determine the drilling angle. On the one hand, it can effectively improve the drilling quality and drilling efficiency, thus effectively avoiding the problems of poor sap flow, increased impurity mixing, and damage to the tree trunk caused by too large drilling angle. On the other hand, it can also effectively avoid the problems of slow sap flow rate, easy blockage, and incomplete sap collection caused by too small drilling angle. Brief Description of the Drawings

[0025] Figure 1 is a schematic structural view of the birch sap collection drilling auxiliary tool in the first embodiment of the present invention; Figure 2 is a front view of the birch sap collection drilling auxiliary tool in the first embodiment of the present invention; Figure 3 is a schematic structural view of the assembled birch sap collection drilling auxiliary tool and an electric drill in the first embodiment of the present invention; Figure 4 is an axonometric view of the bracket in the first embodiment of the present invention; Figure 5 is an axonometric view of the electric drill fixing bracket in the first embodiment of the present invention; Figure 6 is an axonometric view of the electric drill fixing shaft sleeve in the first embodiment of the present invention; Figure 7 is an axonometric view of the connecting rod in the first embodiment of the present invention; Figure 8 is an axonometric view of the bearing connecting sleeve in the first embodiment of the present invention; Figure 9 is a schematic structural view of the birch sap collection drilling auxiliary tool in the second embodiment of the present invention; Figure 10 is an axonometric view of the birch sap collection drilling auxiliary tool in the second embodiment of the present invention; Figure 11 is a schematic structural view of the assembled birch sap collection drilling auxiliary tool and an electric drill in the second embodiment of the present invention; Figure 12 is an axonometric view of the electric drill fixing bracket in the second embodiment of the present invention; Figure 13 is a top view of the birch sap collection drilling auxiliary tool in the second embodiment of the present invention; Figure 14 is Figure 13 a partial enlarged view at A; Figure 15 is an installation schematic diagram of the steel ball, ball retaining ring, connecting rod and positioning ring in the second embodiment of the present invention; Figure 16 is a schematic structural view of the birch sap collection drilling auxiliary tool in the third embodiment of the present invention; Figure 17 is an axonometric view of the birch sap collection drilling auxiliary tool in the third embodiment of the present invention; Figure 18 is a schematic structural view of the assembled birch sap collection drilling auxiliary tool and an electric drill in the third embodiment of the present invention; Figure 19 is an axonometric view of the electric drill fixing bracket in the third embodiment of the present invention; Figure 20 This is the working state diagram of the birch sap collection drilling auxiliary tool of the present invention.

[0026] In the figure: 1. Support; 1-1. Angle limiting cylinder; 1-2. End ring plate; 1-3. Connecting rod; 1-4. Drilling depth limiting jack; 2. Positioning ring; 3. Positioning ring limiting member; 3-1. Pin; 3-2. Sleeve; 3-3. Nut sleeve; 3-4. Compression spring; 3-5. Nut; 4. Electric drill axial feed guiding mechanism; 4-1. Electric drill fixing frame; 4-1-1. Electric drill fixing shaft sleeve; 4-1-2. Connecting rod; 4-1-3. Bearing connecting sleeve. 4-2. Linear bearing; 4-3. Slide rail; 5. Electric drill; 6. Handle; 7. Steel ball; 8. Ball retaining ring. Detailed implementation manners

[0027] Example 1: In combination with Figures 1 to 8 This example is described. A birch sap collection drilling auxiliary tool in this Example 1 includes a support 1, a positioning ring 2, a positioning ring limiting member 3, and an electric drill axial feed guiding mechanism 4. The support 1 is a hollow cylindrical structure with a beveled front end face. The positioning ring 2 is slidably and coaxially sleeved on the front part of the support 1. A plurality of drilling depth limiting gears are sequentially arranged on the side surface of the front part of the support 1 along the axis of the support from front to back. The positioning ring 2 and the support 1 are detachably connected through the positioning ring limiting member 3 to realize free switching between different drilling depth limiting gears in the axial direction of the support. An electric drill 5 is arranged inside the support 1. The electric drill 5 is connected to the support 1 through the electric drill axial feed guiding mechanism 4, so that when the electric drill 5 performs an axial feed action, the drill bit can move along the axis direction of the support, and finally reach the established drilling depth limiting gear position, completing the birch sap collection drilling operation at the established drilling angle and depth.

[0028] Furthermore, the included angle between the front end face of the support 1 and the plane perpendicular to the axis of the support is α, and α = 15°. With such a setting, by setting the front end face of the angle limiting cylinder 1-1 of the support 1 as a 15° bevel, during the process of collecting birch sap by the operator, only by holding the auxiliary tool and pressing the front end face of the angle limiting cylinder 1-1 tightly against the surface of the tree trunk, the drilling angle can be quickly determined, effectively improving the drilling quality and drilling efficiency.

[0029] Furthermore, the bracket 1 includes an angle limiting cylinder 1-1, a terminal ring plate 1-2, and a plurality of connecting rods 1-3. The front end face of the angle limiting cylinder 1-1 is an inclined surface. A terminal ring plate 1-2 arranged coaxially is provided at the rear side of the angle limiting cylinder 1-1. The terminal ring plate 1-2 and the angle limiting cylinder 1-1 are connected by a plurality of connecting rods 1-3 arranged circumferentially. The connecting rods 1-3 are arranged parallel to the axis of the bracket. An electric drill avoidance opening is formed in the side portion of the terminal ring plate 1-2. With such a setting, the middle part of the bracket 1 adopts a connecting rod structure, which can effectively reduce the mass of the auxiliary tool and provide convenience for the operator. In addition, by providing an opening on the side surface of the terminal ring plate 1-2, the assembly of the electric drill can be facilitated.

[0030] Furthermore, the auxiliary tool further includes a handle 6. The handle 6 is arranged on the side wall of the connecting rod 1-3 opposite to the electric drill avoidance opening, and the handle 6 is arranged perpendicular to the connecting rod 1-3. With such a setting, when the operator holds the auxiliary tool to perform the birch sap collection operation, one hand holds the handle 6 and the other hand holds the electric drill handle. On the one hand, the auxiliary tool can be fixed; on the other hand, it is convenient to push the electric drill forward for drilling operations.

[0031] Furthermore, the number of the positioning ring limit members 3 is 2. The 2 positioning ring limit members 3 are respectively located on both sides of the positioning ring 2. Each positioning ring limit member 3 corresponds to 3 drilling depth limit jacks 1-4, and the 3 drilling depth limit jacks 1-4 are evenly arranged in sequence from front to back along the axial direction of the bracket. With such a setting, by arranging a plurality of hole positions at intervals along the axial direction of the bracket on the outer side surface of the front part of the connecting rod 1-3 of the bracket 1, the relative position of the positioning ring 2 on the bracket 1 can be quickly adjusted. After the position of the positioning ring 2 is determined, the positioning ring 2 is fixed by using the positioning ring limit members 3.

[0032] Among them, the number and spacing of the drilling depth limit jacks 1-4 are designed according to the requirements for the drilling depth in the birch sap collection standard: The first drilling depth limit jack 1-4 corresponds to a drilling depth between 7 cm and 8 cm, and is applicable to a tree trunk diameter at breast height between 35 cm and 40 cm; The second drilling depth limit jack 1-4 corresponds to a drilling depth between 5 cm and 6 cm, and is applicable to a tree trunk diameter at breast height between 27 cm and 34 cm; The third drilling depth limit jack 1-4 corresponds to a drilling depth between 3 cm and 4 cm, and is applicable to a tree trunk diameter at breast height between 20 cm and 26 cm.

[0033] Furthermore, the positioning ring limit member 3 adopts a locking screw or a pin mechanism; When the positioning ring limiting member 3 uses a locking screw, the drilling depth limiting socket 1-4 on the outer side of the corresponding connecting rod 1-3 is a threaded hole, and a positioning ring round hole corresponding to the drilling depth limiting socket 1-4 is provided on the side of the positioning ring 2. The locking screw passes through the positioning ring round hole and is threadedly connected to the drilling depth limiting socket 1-4. With such a setting, before the drilling operation, the operator determines the hole position that needs to be adapted to the tree trunk diameter in advance. Specifically, the operator adjusts the position of the positioning ring 2, moves the positioning ring 2 to the corresponding drilling depth limiting socket 1-4, and then fixes the positioning ring 2 to the connecting rod 1-3 through the locking screw. When the operator holds the electric drill and pushes it forward, the front end of the electric drill fixing bracket 4-1 abuts against the rear end surface of the positioning ring 2, and the drilling depth can be determined.

[0034] When the positioning ring limiting member 3 uses a pin mechanism, the drilling depth limiting socket 1-4 on the outer side of the corresponding connecting rod 1-3 is a circular smooth hole, and a positioning ring round hole corresponding to the drilling depth limiting socket 1-4 is provided on the side of the positioning ring 2. The pin mechanism includes a pin 3-1, a sleeve 3-2, a nut sleeve 3-3, a compression spring 3-4, and a nut 3-5. One end of the pin 3-1 passes through the positioning ring round hole and is inserted into the corresponding drilling depth limiting socket 1-4. The middle of the pin 3-1 is sleeved with the sleeve 3-2. One end of the sleeve 3-2 is fixedly connected to the positioning ring 2. A stepped surface is provided on the inner wall of the sleeve 3-2, and a shoulder is provided in the middle of the pin 3-1. The other end of the sleeve 3-2 is threadedly connected to the nut sleeve 3-3. The middle of the pin 3-1 is sleeved with the compression spring 3-4. The lower end of the compression spring 3-4 abuts against the upper surface of the shoulder of the pin 3-1, and the upper end of the compression spring 3-4 abuts against the lower end surface of the nut sleeve 3-3. The other end of the pin 3-1 is threadedly connected to the nut 3-5. With such a setting, the working process of the pin mechanism is similar to that of the locking screw, except that when moving the positioning ring 2, the operator pulls the nut 3-5 outwards. At this time, the end of the pin 3-1 disengages from the hole position, so that the positioning ring 2 can move up and down freely. When the positioning ring 2 moves to the position of the corresponding drilling depth limiting socket 1-4, the operator releases the nut 3-5, so that the end of the pin 3-1 is inserted into the hole position, realizing the fixation between the positioning ring 2 and the connecting rod 1-3.

[0035] Further, the outer side surface of the connecting rod 1-3 is an arc surface. The auxiliary tool further includes a plurality of steel balls 7 and a plurality of ball retaining rings 8. The inner side surface of the positioning ring 2 is provided with two hemispherical grooves symmetrically arranged on the left and right sides of the radial circular holes in the positioning ring. The steel balls 7 are embedded in the hemispherical grooves. An axial guide groove with an arc-shaped cross-section matching the hemispherical groove is formed on the outer side surface of the connecting rod 1-3. When the positioning ring 2 and the connecting rod 1-3 move relative to each other, rolling cooperation is achieved through the steel balls 7. A stepped ring groove is provided at the top end of the hemispherical groove on the inner side surface of the positioning ring 2, and the ball retaining ring 8 is embedded in the stepped ring groove. The ball retaining ring 8 and the positioning ring 2 are connected by a connecting member, and the diameter of the central hole of the ball retaining ring 8 is smaller than the diameter of the steel ball. With such a setting, when the positioning ring 2 is moved, rolling cooperation is achieved between the positioning ring 2 and the connecting rod 1-3 through the steel balls 7. On the one hand, the friction can be reduced, ensuring that the positioning ring 2 can be easily moved, which is labor-saving and convenient; on the other hand, the coaxiality between the positioning ring 2 and the bracket 1 can be ensured, thereby ensuring the drilling quality.

[0036] Further, the electric drill axial feed guiding mechanism 4 includes an electric drill fixing frame 4-1, a linear bearing 4-2, and a slide rail 4-3. The electric drill fixing frame 4-1 includes an electric drill fixing bushing 4-1-1, a plurality of connecting rods 4-1-2, and a plurality of bearing connecting sleeves 4-1-3. The central hole of the electric drill fixing bushing 4-1-1 has a clearance fit with the front end cylindrical section of the outer shell of the electric drill 5. A plurality of radial connecting rods 4-1-2 are provided on the outer side of the electric drill fixing bushing 4-1-1, and one bearing connecting sleeve 4-1-3 is respectively provided at the end of each radial connecting rod 4-1-2. The linear bearing 4-2 is embedded in the inner hole of the bearing connecting sleeve 4-1-3, and the slide rail 4-3 is inserted into the inner hole of the linear bearing 4-2. Both ends of the slide rail 4-3 are respectively connected to the angle limiting cylinder 1-1 and the end ring plate 1-2. With such a setting, when the electric drill is pushed downward, the electric drill drives the electric drill fixing frame 4-1 to move synchronously. The electric drill fixing frame 4-1 is connected to the slide rail 4-3 through the linear bearing 4-2, so that it can be ensured that the electric drill bit can move along the axis of the bracket, thereby ensuring the drilling quality.

[0037] Further, the number of the connecting rods 4-1-2, the bearing connecting sleeves 4-1-3, the linear bearings 4-2, and the slide rails 4-3 is 2 each, and the two connecting rods 4-1-2 are symmetrically arranged on both sides of the electric drill fixing bushing 4-1-1. With such a setting, by arranging two symmetrically arranged connecting rods 4-1-2 on both sides, the stable movement of the electric drill can be ensured.

[0038] Further, the electric drill fixing frame 4-1 is of a split structure, and the electric drill fixing bushing 4-1-1, the connecting rods 4-1-2, and the bearing connecting sleeves 4-1-3 are assembled by means of assembly. With such a setting, by adopting the split electric drill fixing frame 4-1, it is convenient for the assembly between parts and the replacement of parts, reducing the equipment cost.

[0039] Among them, a plurality of radial threaded holes of the shaft sleeve are formed on the outer side of the electric drill fixed shaft sleeve 4-1-1. One end of the connecting rod 4-1-2 is provided with a screw rod matching the radial threaded hole of the shaft sleeve. A radial circular hole of the connecting sleeve is formed on the outer side of the bearing connecting sleeve 4-1-3. The other end of the connecting rod 4-1-2 is inserted into the radial circular hole of the bearing connecting sleeve 4-1-3 in an interference fit manner.

[0040] Embodiment 2: Combining Figures 9 to 15 To describe this Embodiment 2, the difference between this Embodiment 2 and Embodiment 1 is that the number of the connecting rods 4-1-2, the bearing connecting sleeves 4-1-3, the linear bearings 4-2 and the slide rails 4-3 is 3. Two of the three connecting rods 4-1-2 are symmetrically arranged on both sides of the electric drill fixed shaft sleeve 4-1-1, and the other connecting rod 4-1-2 is located between the above two connecting rods 4-1-2, and the middle connecting rod 4-1-2 is oppositely arranged with the electric drill avoidance opening on the side of the end ring plate 1-2 of the bracket 1. With such a setting, by arranging two symmetrically arranged connecting rods 4-1-2 on both sides, the stable movement of the electric drill can be ensured. The middle connecting rod 4-1-2 is oppositely arranged with the electric drill avoidance opening, which can avoid interference between parts while ensuring stability.

[0041] Embodiment 3: Combining Figures 16 to 19 To describe this Embodiment 3, the differences between this Embodiment 3 and Embodiment 1 and Embodiment 2 are that the electric drill fixing frame 4-1 is an integral structure, and the electric drill fixed shaft sleeve 4-1-1, the connecting rod 4-1-2 and the bearing connecting sleeve 4-1-3 are integrally formed. With such a setting, using the integral electric drill fixing frame 4-1 can improve the strength of the parts.

[0042] Working principle Combining Figures 1 to 20 To describe the working principle of the birch sap collection drilling auxiliary tool of the present invention: Before drilling, the operator first determines the hole position to be adapted according to the trunk diameter at breast height. First, move the positioning ring 2 to the corresponding drilling depth limit jack 1-4, and then fix the positioning ring 2 and the connecting rod 1-3 through the locking screw. When the operator holds the electric drill and pushes it forward, the front end of the electric drill fixing frame 4-1 abuts against the rear end face of the positioning ring 2, and the drilling depth can be determined.

[0043] When drilling, first, the operator holds the handle 6 with one hand and the electric drill handle with the other hand. Then, press the front end face of the angle limiting cylinder 1-1 against the surface of the tree trunk, and the drilling angle can be quickly determined. Finally, push the electric drill forward to perform the drilling operation.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A drilling assistance tool for birch sap collection, characterized in that: The auxiliary tool includes a bracket (1), a positioning ring (2), a positioning ring stopper (3), and an axial feed guiding mechanism (4) for the electric drill. The bracket (1) is a hollow cylindrical structure with an inclined front face. The positioning ring (2) is slidably and coaxially sleeved on the front part of the bracket (1). Multiple drilling depth limit gears are sequentially arranged on the side surface of the front part of the bracket (1) from front to back along the axis of the bracket. The positioning ring (2) and the bracket (1) are detachably connected through the positioning ring stopper (3) to achieve free switching between different drilling depth limit gears in the axial direction of the bracket. An electric drill (5) is arranged inside the bracket (1), and the electric drill (5) is connected to the bracket (1) through the axial feed guiding mechanism (4) of the electric drill, so that when the electric drill (5) performs an axial feed action, the drill bit can move along the axis direction of the bracket and finally reach the established drilling depth limit gear position, completing the birch sap collection drilling operation at the established drilling angle and depth.

2. The birch sap collection drilling auxiliary tool according to claim 1, characterized in that: The angle between the front face of the bracket (1) and the plane perpendicular to the axis of the bracket is α, and α = 15°.

3. The birch sap collection drilling auxiliary tool according to claim 1 or 2, characterized in that: The bracket (1) includes an angle limit cylinder (1-1), a terminal ring plate (1-2), and multiple connecting rods (1-3). The front face of the angle limit cylinder (1-1) is inclined. A coaxially arranged terminal ring plate (1-2) is provided at the rear side of the angle limit cylinder (1-1). The terminal ring plate (1-2) and the angle limit cylinder (1-1) are connected through multiple circumferentially arranged connecting rods (1-3). The connecting rods (1-3) are arranged parallel to the axis of the bracket. An electric drill avoidance opening is provided on the side part of the terminal ring plate (1-2).

4. The birch sap collection drilling auxiliary tool according to claim 3, characterized in that: The auxiliary tool further includes a handle (6). The handle (6) is arranged on the side wall of the connecting rod (1-3) opposite to the electric drill avoidance opening, and the handle (6) is arranged perpendicular to the connecting rod (1-3).

5. The birch sap collection drilling aid according to claim 4, characterized in that: The number of the positioning ring stoppers (3) is 2. The 2 positioning ring stoppers (3) are respectively located on both sides of the positioning ring (2). Each positioning ring stopper (3) corresponds to 3 drilling depth limit jacks (1-4), and the 3 drilling depth limit jacks (1-4) are evenly arranged from front to back along the axis of the bracket.

6. The birch sap collection drilling auxiliary tool according to claim 5, characterized in that: The positioning ring stopper (3) adopts a locking screw or a pin mechanism; When the positioning ring stopper (3) adopts a locking screw, the drilling depth limit jack (1-4) on the outer side surface of the corresponding connecting rod (1-3) is a threaded hole. A positioning ring round hole corresponding to the drilling depth limit jack (1-4) is provided on the side surface of the positioning ring (2). The locking screw passes through the positioning ring round hole and is threadedly connected to the drilling depth limit jack (1-4); When the positioning ring limiting member (3) adopts a pin mechanism, the drilling depth limiting jack (1-4) on the outer side of the corresponding connecting rod (1-3) is a circular light hole. A positioning ring circular hole corresponding to the drilling depth limiting jack (1-4) is provided on the side of the positioning ring (2). The pin mechanism includes a pin (3-1), a sleeve (3-2), a screw sleeve (3-3), a compression spring (3-4), and a nut (3-5). One end of the pin (3-1) passes through the positioning ring circular hole and is inserted into the corresponding drilling depth limiting jack (1-4). The middle part of the pin (3-1) is sleeved with the sleeve (3-2). One end of the sleeve (3-2) is fixedly connected to the positioning ring (2). A step surface is provided on the inner wall of the sleeve (3-2). A shoulder is provided in the middle of the pin (3-1). The other end of the sleeve (3-2) is threadedly connected to the screw sleeve (3-3). The middle part of the pin (3-1) is sleeved with the compression spring (3-4). The lower end of the compression spring (3-4) abuts against the upper surface of the shoulder of the pin (3-1). The upper end of the compression spring (3-4) abuts against the lower end surface of the screw sleeve (3-3). The other end of the pin (3-1) is threadedly connected to the nut (3-5).

7. The birch sap collection drilling aid tool according to claim 1 or 6, characterized in that: The outer side of the connecting rod (1-3) is an arc surface. The auxiliary tool further includes a plurality of steel balls (7) and a plurality of ball retaining rings (8). Two hemispherical grooves symmetrically arranged on the left and right sides of the radial circular hole of the positioning ring are provided on the inner side of the positioning ring (2). The steel balls (7) are embedded in the hemispherical grooves. An axial guide groove with an arc-shaped cross-section matching the hemispherical groove is opened on the outer side of the connecting rod (1-3). When the positioning ring (2) and the connecting rod (1-3) move relative to each other, rolling cooperation is achieved through the steel balls (7). A stepped ring groove is provided at the top of the hemispherical groove on the inner side of the positioning ring (2). The ball retaining ring (8) is embedded in the stepped ring groove. The ball retaining ring (8) is connected to the positioning ring (2) through a connecting member. The diameter of the central hole of the ball retaining ring (8) is smaller than the diameter of the steel ball.

8. A birch sap collection drilling aid according to claim 7, characterized in that: The electric drill axial feed guiding mechanism (4) includes an electric drill fixing frame (4-1), a linear bearing (4-2), and a slide rail (4-3). The electric drill fixing frame (4-1) includes an electric drill fixing bushing (4-1-1), a plurality of connecting rods (4-1-2), and a plurality of bearing connecting sleeves (4-1-3). The central hole of the electric drill fixing bushing (4-1-1) has a clearance fit with the front end cylindrical section of the outer shell of the electric drill (5). A plurality of radial connecting rods (4-1-2) are provided on the outer side of the electric drill fixing bushing (4-1-1). One bearing connecting sleeve (4-1-3) is provided at the end of each radial connecting rod (4-1-2). The linear bearing (4-2) is embedded in the inner hole of the bearing connecting sleeve (4-1-3). The slide rail (4-3) is inserted into the inner hole of the linear bearing (4-2). Both ends of the slide rail (4-3) are respectively connected to the angle limiting cylinder (1-1) and the end ring plate (1-2).

9. The birch sap collection drilling auxiliary tool according to claim 8, characterized in that: The electric drill fixing frame (4-1) is an integral structure. The electric drill fixing bushing (4-1-1), the connecting rod (4-1-2), and the bearing connecting sleeve (4-1-3) are integrally formed.

10. The birch sap collection drilling auxiliary tool according to claim 8, characterized in that: The electric drill fixing bracket (4-1) is of a split structure, and the electric drill fixing shaft sleeve (4-1-1), the connecting rod (4-1-2) and the bearing connecting sleeve (4-1-3) are assembled in a modular way.

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